#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{
	int n;
	scanf("%d", &n);
	for (int i = 1;i <= n;i++) {
		for (int j = 1;j < i;j++) {
			printf(" ");
		}
		for (int k = 0;k <= (6 - 2 * (i - 1));k++) {
			char arr[] = "abcdefg";
			printf("%c", arr[k]);
		}printf("\n");
	}
	
	
	return 0;
}